- Zones build their Room collection during instancing.

- Zones can not be instanced without providing the owning realm in its constructor.
 - Started adding tooltips to the editors.
 - Zone Builder now checks if a Realm has been loaded yet or not prior to creating Zones.
 - Zone Builder will not allow Rooms to be created within new Zones until the Zone has been saved.
 - Zone Builder checks if a New Zone has not been saved yet prior to creating another New Zone
 - Renamed Room.ParentZone to Room.Zone to be consistent with the Realm and Zone classes.

Mud Designer/MudEngine/GameObjects/Environment/Zone.cs

@@ -1,14 +1,19 @@
 using System;
+using System.IO;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.ComponentModel;
+using System.Xml.Serialization;
+
+using MudDesigner.MudEngine.FileSystem;
+using MudDesigner.MudEngine.GameObjects;
 
 namespace MudDesigner.MudEngine.GameObjects.Environment
 {
+    [XmlInclude(typeof(Room))]
     public class Zone : BaseObject
     {
-
         [Category("Environment Information")]
         [DefaultValue(0)]
         public int StatDrainAmount
@@ -32,13 +37,43 @@ namespace MudDesigner.MudEngine.GameObjects.Environment
             get;
             set;
         }
+        
         internal List<Room> Rooms { get; set; }
 
-
-
         public Zone()
+        {
+            throw new NotSupportedException("Parameterless constructors of Type " + this.GetType().FullName + " is not supported.");
+        }
+
+        public Zone(Realm realm)
         {
             Rooms = new List<Room>();
+            //incase a realm hasn't been assigned to it yet.
+            if (this.Realm == null)
+                return;
+
+            //Create our collection of Rooms.
+            string realmPath = Path.Combine(FileManager.GetDataPath(SaveDataTypes.Realms), realm.Name);
+            string zonePath = Path.Combine(realmPath, this.Name);
+            string[] rooms = Directory.GetFiles(zonePath, "*.room");
+
+            foreach (string file in rooms)
+            {
+                Room r = new Room();
+                r = (Room)FileManager.Load(file, r);
+                this.Rooms.Add(r);
+            }
+        }
+
+        public Room GetRoom(string RoomName)
+        {
+            foreach (Room r in Rooms)
+            {
+                if (r.Name == RoomName)
+                    return r;
+            }
+
+            return null;
         }
     }
 }